Problem 11.4

The following MALDI spectrum has been obtained from a water-soluble biopolymer in onions. It has been acquired in the positive-ion mode and 2,5-DHB was used as the matrix. The isotopic pattern is not resolved.

MALDI spectrum of a biopolymer

a) What kind of biopolymer do you expect? Use the mass difference between peaks to identify the compound class.

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